A304007 Number of nX5 0..1 arrays with every element unequal to 0, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

1, 26, 27, 64, 137, 271, 655, 1412, 3245, 7809, 17290, 40682, 93292, 216048, 499755, 1162587, 2685521, 6238096, 14489376, 33631721, 78120529, 181638185, 422198419, 981730209, 2284138522, 5314049218, 12366970040, 28787274304, 67017999388

Offset

1,2

Comments

Column 5 of A304010.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=5
..0..0..0..0..0. .0..0..0..1..1. .0..1..0..1..0. .0..0..1..1..1
..1..1..0..1..1. .1..1..1..0..0. .0..1..1..1..0. .1..1..0..0..0
..0..1..1..1..0. .0..1..0..0..0. .0..0..1..0..0. .1..0..0..0..0
..1..1..0..1..1. .1..1..0..1..1. .0..1..1..1..0. .0..0..0..1..1
..0..0..0..0..0. .0..0..1..1..0. .0..1..0..1..0. .1..0..1..1..0

Crossrefs

Cf. A304010.

Sequence in context: A042356 A042354 A042352 * A305357 A042374 A042376

Adjacent sequences: A304004 A304005 A304006 * A304008 A304009 A304010

Keyword

nonn

Author

R. H. Hardin, May 04 2018

Status

approved